土壤学报2013，Vol.50Issue(1)：30-40,11.
浙江省1∶5万大比例尺土壤数据库
A 1∶50 000 SCALE SOIL DATABASE OF ZHEJIANG PROVINCE, CHINA
吴嘉平 1胡义镰 1支俊俊 1荆长伟 1陈红金 2徐进 2林声盼 1李丹 1张操1
作者信息
- 1. 浙江大学环境与资源学院,浙江省农业遥感与信息技术重点研究实验室,杭州310058
- 2. 浙江省土肥站,杭州310009
- 折叠
摘要
Abstract
With the aim of exploring and conserving soil resources,and promoting soil science,China conducted the second nation-wide soil survey in 1979,and has made substantial achievements out of the survey.To make better use of the results and also to keep abreast of the development in science and technology,constructing a soil database became an urgent task.After ten years of joint efforts,a soil database for Zhejiang Province was completed,encompassing 1 ∶ 50 000 digitized soil maps for all the counties of the Province and consisting of three sections,i.e.spatial data,attribute data and meta data.The use of the techniques of automatic and semi-automatic soil boundary recognition developed through independent R&D significantly improved accuracy and efficiency of soil map digitization.The formulation of the standards for the soil database ensured standardization and orderliness of the database establishment.By referring to topographic maps and remote-sensing images,errors in soil maps were corrected in line with the topology and the soil science,thus solving problems in the original maps,such as missing of polylines and labels,and mis-matching along the administrative boundary,etc.and significantly improving the quality of soil maps.Collations of the soil surveys and classifications of counties and districts and the province were made with the national standards for soil classification,thus solving the problems,such as "one soil has various names" and "different soils share the same name",existing in the soil survey.The estab lished soil spatial database has a total of 156 581 polygons and 2 677 soil profiles collected and collated,thus generating a seamless provincial-wide soil map well-linked with soil attributes,which to a certain extent lay a solid foundation for digital soils of Zhejiang.Besides,we discussed the shortages of this work and future direction for improvement in the hope that while consummating the large-scale soil database of Zhejiang,the research may also provide experiences for other provinces or regions to refer to in building up their soil databases.关键词
大比例尺/土壤调查/数字化/土壤数据库/浙江Key words
Large scale / Soil survey / Digitizing / Soil database / Zhejiang Province分类
农业科技引用本文复制引用
吴嘉平,胡义镰,支俊俊,荆长伟,陈红金,徐进,林声盼,李丹,张操..浙江省1∶5万大比例尺土壤数据库[J].土壤学报,2013,50(1):30-40,11.
